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**Already Gone** · 12-05-2019, 01:02 AM

Same issue , Put a complete Petronix in my 72 and tach is out, reading higher than it should, 4/500 RPM at 70mph. Called Petronix and they suggested getting some resistor which I did and it still is out.
Thanks for those part numbers Leon as I have to pull my dash and will check which tach I have because tach was assembled by Paul ( PTs70 CST) with original parts. It was also reading high like 7/800 with the points distributor when I installed it in the truck.

12-05-2019, 01:02 AM	#8
Already Gone 70+ ( Old Skool Club ) Join Date: Nov 2003 Location: Saskatoon, Saskatchewan ,Canada Posts: 9,161	Re: factory tach Same issue , Put a complete Petronix in my 72 and tach is out, reading higher than it should, 4/500 RPM at 70mph. Called Petronix and they suggested getting some resistor which I did and it still is out. Thanks for those part numbers Leon as I have to pull my dash and will check which tach I have because tach was assembled by Paul ( PTs70 CST) with original parts. It was also reading high like 7/800 with the points distributor when I installed it in the truck. __________________ 1972 C10 Custom/Deluxe 613 Highlander 406/700R4 1999 White Tahoe LS 4x2 with Z56 Police Package 1992 K1500 GMC Suburban Members I have personally met: MusicMan70 - HeavyD - ChewyChevy67 - StingRay -71SWB4x4 - 67 Burb - DeadheadNM - too much stuff - bc65 - das601 " Circumsatances Do Not Change Responsibility " " The Sky is not the Limit, Your Mind is." Marilyn Monroe .. RIP Charlie Watts 1941 - 2021